Add a run-time start-up switch -s/--store-backend to choose the data store backend

README.md

@@ -45,6 +45,7 @@ The following options are available:
      --metrics-address      Listening address of the metrics server [=127.0.0.1].
      --metrics-port         Listening HTTP port of the metrics server [=8008].
  -d, --data-dir             The directory where codex will store configuration and data..
+ -s, --store-backend        data store backend: fs, sqlite [=fs].
  -l, --listen-port          Specifies one or more listening ports for the node to listen on. [=0].
  -i, --listen-ip            The public IP [=0.0.0.0].
      --udp-port             Specify the discovery (UDP) port [=8090].

codex/codex.nim

@@ -140,8 +140,18 @@ proc new*(T: type CodexServer, config: CodexConf): T =
     raise (ref Defect)(
       msg: "Unable to create data directory for block store: " & repoDir)
 
+  let localStore =
+    case config.storeBackend
+    of cachedStore:
+      notice "Using --cache backend data store"
+      cache
+    of FS:
+      notice "Using FS backend data store"
+      FSStore.new(repoDir, cache = cache)
+    of SQLite:
+      notice "Using SQLite backend data store"
+      SQLiteStore.new(repoDir, cache = cache)
   let
-    localStore = SQLiteStore.new(repoDir, cache = cache)
     peerStore = PeerCtxStore.new()
     pendingBlocks = PendingBlocksManager.new()
     discovery = DiscoveryEngine.new(localStore, peerStore, network, blockDiscovery, pendingBlocks)

codex/conf.nim

@@ -44,6 +44,11 @@ type
     Json = "json"
     None = "none"
 
+  StoreKind* = enum
+    cachedStore = "cached"
+    FS = "fs"
+    SQLite = "sqlite"
+
   CodexConf* = object
     logLevel* {.
       defaultValue: LogLevel.INFO
@@ -80,6 +85,14 @@ type
       abbr: "d"
       name: "data-dir" }: OutDir
 
+    storeBackend* {.
+      desc: "data store backend: fs, sqlite"
+      defaultValue: StoreKind.FS
+      defaultValueDesc: "fs"
+      abbr: "s"
+      name: "store-backend"
+    .}: StoreKind
+
     case cmd* {.
       command
       defaultValue: noCommand }: StartUpCommand